Warp stop-motion for looms.



S. S. JACKSON.

WARP STOP MOTION F0 R LOOMS. APPLICATION FILED AUG.21`. I9I4.

1,143,120. I Patented June 15, 1915.l

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SIMEON S. JACKSON, 0F BOSTON, MASSACHUSETTS, ASSIGNOR TO TI-IE STAFFORD COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION 0F NEW JERSEY.

WARP STOP-MOTION FOR LOOMS.

Specification of Letters Patent.

Patented June 15, 1915.

T0 all whom it may concern:

Be it known thatv I, SIMEON S. JACKSON, a subject of Great Britain, residing at Boston, in the county of Suffolk, State of Massachusetts, have invented a certain new and useful Improvement in Warp Stop-Motions for Looms, of which the following is a specification, reference being had therein to the accompanying drawings.

My improved warp-stop-motion is better adapted for use in weaving silk and other fabrics containing a large number of fine warp-threads to the inch than the warpstop-motions heretofore employed in practice. It eliminates close massing and crowd-` ing of the drop-wires, and chaing and other troublesome evils and disadvantages, more eiectually in the case of such fabrics than warp-stop-motions previously in use.

The invention comprises the combination of warpdividing rods or bars at front and rear, respectively, of the drop-wires, a warprest for the lower sheet of warp-threads located intermediately with respect to the warp-dividing rods or bars. and drop-wires in four banks hung upon the warp-threads in a special relation to the warp-dividing f rods or bars and intermediate warp-rest.

1 The drawing shows in cross-section a warp-stopmotion embodying the invention.

The lower portion of one of the usual end-castings of a warp-stopmotion is shown at 1, the upper portion of said casting being broken away to simplify the drawing. At 2. 2, are warp-dividing rods or bars, which in practice will be engaged with the upper portions of the castings of the warp-stopmotion. By means of these rods or bars I divide the warp-threads into two portions, as shown. The warp-threads of the portion a pass in a sheet over both of the said rods or bars, and rest thereon. Those of the portion o pass in another sheet below both rods or bars. At 3 is a warp-supporting bar lo cated between the two warp-dividing rods or bars 2, 2, and supported in practice by the castings aforesaid. The bar 3 supports the warp-threads b midway between the warpdividing rods or bars. The four banks of drop-wires 4, 4a, 4b, 4, are hung upon the warp-threads between the two Warpdividing rods or bars, two of such banks being located between one of the said rods or bars and the warp-supporting bar 3, and the other two banks between the other warpdividing rod or bar and the` said warpsupporting bar. The usual bars for keeping the drop-Wires in aliucment in the desired bank-arrangement, and guiding them in their vertical movement, are shown at 5, 5, etc. At 6 is a horizontal slot in the lower portion of casting l, serving as a guidewav for the usual vibrator or feeler (not shown-V) in its movement from front to rear and vice versa beneath the drop-wires. At 7, 7, 7, are the back-stops against which the lower ends of dropped drop-wires are pressed by the said vibrator or feeler.

In carrying my invention into effect I hang a drop-wire i of the first bank upon a warp-thread of the upper sheet a, and a drop-wire 4C of the fourth bank upon the next adjoining warp-thread of such sheet. I hang a drop-wire 4 of the second bank upon a warpthread of the lower sheet b, and a drop-w1re 4b of the third bank upon the next adjoining warp-thread of the lower sheet. The drop-wires of the first and fourth banks are hung upon the respective Warpthreads of the upper sheet close to the respective dividing rods 2. 2, and from this it results that the said rods assist in supporting the weight of the drop-wires of the said banks. The drop-wires of the second and third banks are hung upon the respective warp-threads of the lower sheet close to the warp-supporting rod 3, at opposite sides of the latter, and from this it results that the warp-supporting rod 3 assists in supporting the weight of the drop -wires of the second and third banks.

The drop-wires of the first and fourth banks hang down from the warp-threads of the upper sheet between the warp-threads of the lower sheet of warp-threads, but the head-ends of the drop-wires of the second and third banks of drop-wires are short and consequently the warp-threads of the upper sheet pass above the said head-ends and do not contact with the drop-wires of the said banks.

It will be perceived that my invention, in addition to enabling me to secure the advantages in respect of lessening the massing together and crowding of the drop-wires which result from dividing and distributing the drop-wires into four banks instead of two as most usual, provides advantageously for supporting the warp-threads and their drop-wires by means of the warp-dividing rods or bars and the warp-supporting bar 3,

and avoids contact of the drop-Wires of the second and third banks with the Warpthreads of the upper sheet.y It also enables me to dispense with the ordinary leasing of the warp-threads, if desired.

I claim as my invention In a warp-stop-motion for looms, in cornbination, opposite warp-dividing rods which divide the warp-threads in a loom into upper and lower sheets, a warp-supporting bar for the lower sheet of Warp-threads located between the said warp-dividing rods, and four banks of drop-wires having the dropwires of the first and fourth banks hung upon warp-threads of the upper sheet close -to the respective warp-dividing rods and the drop-wires of the second and third banks hung upon warp-threads of the lower sheet closely adjacent the opposite sides of the warp-supporting bar, and with the latter drop-wires entirely below and out of Contact with the warp-threads of the upper sheet.

In testimony whereof I alix my signature in presence of two witnesses.

sIMEoN s. JACKSON.

Witnesses:

CHAs. F. RANDALL, E. A. BAR'rzscH. 

